If diagnosis and treatment are not widely available, how can this page assert that 1/3 of children have lead poisoning?
Is it just an educated guess?
Is it just an educated guess?
I gather they do estimates based on sampling, but no doubt the testing rates and accuracy vary a lot from country to country, and the figure is presented for rhetorical impact over precision.
[1] https://www.unicef.org/media/109361/file/The%20toxic%20truth...